1. Non-wood Product: Rubber Tree;Allen,2004
2. Processing of Natural Rubber;Cecil,2003
3. Industrial Sector Codes of Practice for Pollution Prevention (Cleaner Technology) – Concentrated Latex and Blocked Rubber (STR 20);DIW,2001
4. Annual Environmental Report;EGAT,2011
5. The Eco-Indicator 99: A Damaged Oriented Method for Life Cycle Impact Assessment, Methodology Report;Goedkoop,2001